Colutea arborescens is a species of leguminous shrub known by the common name bladder senna. It is native to Europe and North Africa, but it is known on other continents where it is grown as an ornamental and used in landscaping for erosion control. It is also known in the wild as an occasionally weedy escapee from cultivation. The shrub takes a rounded form and has many branches covered in deciduous leaves. The leaves are made up of many pairs of slightly hairy oval-shaped leaflets, each up to about 3 centimeters long. The inflorescence is a raceme of generally pea-like yellow flowers about 3 centimeters long. The fruit is an inflated bladdery pod which dries to a papery texture. It is 2 to 3 centimeters long and contains many seeds. (info source: wikipedia.org)
Genus - Colutea
Species - Arborescens
Common name - Bladder Senna
Pre-Treatment - Not-required
Hardiness zones - 5 - 7
Height - 11' / 3,60 m
Spread - 9' / 3 m
Plant type - Shrub
Vegetation type - Deciduous
Exposure - Full Sun, Partial Shade
Growth rate - Fast
Soil PH - Acidic, Neutral, Alkaline
Soil type - Light (sandy), medium (loamy), heavy (clay)
Water requirements - Average Water
Bloom season - Late Winter
Leaf / Flower color - Green / Yellow
1. Soak in sulfuric or nitric acid for 1-2 hours and wash under cold water for 10-15 minutes prior to planting.
2. Sow 5 mm deep, keep moist and warm.
As soon as they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter.
WARNING: The seed is poisonous!